| /* |
| * Adaptec AAC series RAID controller driver |
| * (c) Copyright 2001 Red Hat Inc. <alan@redhat.com> |
| * |
| * based on the old aacraid driver that is.. |
| * Adaptec aacraid device driver for Linux. |
| * |
| * Copyright (c) 2000 Adaptec, Inc. (aacraid@adaptec.com) |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2, or (at your option) |
| * any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; see the file COPYING. If not, write to |
| * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
| * |
| * Module Name: |
| * rkt.c |
| * |
| * Abstract: Hardware miniport for Drawbridge specific hardware functions. |
| * |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/init.h> |
| #include <linux/types.h> |
| #include <linux/sched.h> |
| #include <linux/pci.h> |
| #include <linux/spinlock.h> |
| #include <linux/slab.h> |
| #include <linux/blkdev.h> |
| #include <linux/delay.h> |
| #include <linux/completion.h> |
| #include <linux/time.h> |
| #include <linux/interrupt.h> |
| #include <asm/semaphore.h> |
| |
| #include <scsi/scsi_host.h> |
| |
| #include "aacraid.h" |
| |
| static irqreturn_t aac_rkt_intr(int irq, void *dev_id, struct pt_regs *regs) |
| { |
| struct aac_dev *dev = dev_id; |
| |
| if (dev->new_comm_interface) { |
| u32 Index = rkt_readl(dev, MUnit.OutboundQueue); |
| if (Index == 0xFFFFFFFFL) |
| Index = rkt_readl(dev, MUnit.OutboundQueue); |
| if (Index != 0xFFFFFFFFL) { |
| do { |
| if (aac_intr_normal(dev, Index)) { |
| rkt_writel(dev, MUnit.OutboundQueue, Index); |
| rkt_writel(dev, MUnit.ODR, DoorBellAdapterNormRespReady); |
| } |
| Index = rkt_readl(dev, MUnit.OutboundQueue); |
| } while (Index != 0xFFFFFFFFL); |
| return IRQ_HANDLED; |
| } |
| } else { |
| unsigned long bellbits; |
| u8 intstat; |
| intstat = rkt_readb(dev, MUnit.OISR); |
| /* |
| * Read mask and invert because drawbridge is reversed. |
| * This allows us to only service interrupts that have |
| * been enabled. |
| * Check to see if this is our interrupt. If it isn't just return |
| */ |
| if (intstat & ~(dev->OIMR)) |
| { |
| bellbits = rkt_readl(dev, OutboundDoorbellReg); |
| if (bellbits & DoorBellPrintfReady) { |
| aac_printf(dev, rkt_readl (dev, IndexRegs.Mailbox[5])); |
| rkt_writel(dev, MUnit.ODR,DoorBellPrintfReady); |
| rkt_writel(dev, InboundDoorbellReg,DoorBellPrintfDone); |
| } |
| else if (bellbits & DoorBellAdapterNormCmdReady) { |
| rkt_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdReady); |
| aac_command_normal(&dev->queues->queue[HostNormCmdQueue]); |
| // rkt_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdReady); |
| } |
| else if (bellbits & DoorBellAdapterNormRespReady) { |
| rkt_writel(dev, MUnit.ODR,DoorBellAdapterNormRespReady); |
| aac_response_normal(&dev->queues->queue[HostNormRespQueue]); |
| } |
| else if (bellbits & DoorBellAdapterNormCmdNotFull) { |
| rkt_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdNotFull); |
| } |
| else if (bellbits & DoorBellAdapterNormRespNotFull) { |
| rkt_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdNotFull); |
| rkt_writel(dev, MUnit.ODR, DoorBellAdapterNormRespNotFull); |
| } |
| return IRQ_HANDLED; |
| } |
| } |
| return IRQ_NONE; |
| } |
| |
| /** |
| * aac_rkt_disable_interrupt - Disable interrupts |
| * @dev: Adapter |
| */ |
| |
| static void aac_rkt_disable_interrupt(struct aac_dev *dev) |
| { |
| rkt_writeb(dev, MUnit.OIMR, dev->OIMR = 0xff); |
| } |
| |
| /** |
| * rkt_sync_cmd - send a command and wait |
| * @dev: Adapter |
| * @command: Command to execute |
| * @p1: first parameter |
| * @ret: adapter status |
| * |
| * This routine will send a synchronous command to the adapter and wait |
| * for its completion. |
| */ |
| |
| static int rkt_sync_cmd(struct aac_dev *dev, u32 command, |
| u32 p1, u32 p2, u32 p3, u32 p4, u32 p5, u32 p6, |
| u32 *status, u32 *r1, u32 *r2, u32 *r3, u32 *r4) |
| { |
| unsigned long start; |
| int ok; |
| /* |
| * Write the command into Mailbox 0 |
| */ |
| rkt_writel(dev, InboundMailbox0, command); |
| /* |
| * Write the parameters into Mailboxes 1 - 6 |
| */ |
| rkt_writel(dev, InboundMailbox1, p1); |
| rkt_writel(dev, InboundMailbox2, p2); |
| rkt_writel(dev, InboundMailbox3, p3); |
| rkt_writel(dev, InboundMailbox4, p4); |
| /* |
| * Clear the synch command doorbell to start on a clean slate. |
| */ |
| rkt_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0); |
| /* |
| * Disable doorbell interrupts |
| */ |
| rkt_writeb(dev, MUnit.OIMR, dev->OIMR = 0xff); |
| /* |
| * Force the completion of the mask register write before issuing |
| * the interrupt. |
| */ |
| rkt_readb (dev, MUnit.OIMR); |
| /* |
| * Signal that there is a new synch command |
| */ |
| rkt_writel(dev, InboundDoorbellReg, INBOUNDDOORBELL_0); |
| |
| ok = 0; |
| start = jiffies; |
| |
| /* |
| * Wait up to 30 seconds |
| */ |
| while (time_before(jiffies, start+30*HZ)) |
| { |
| udelay(5); /* Delay 5 microseconds to let Mon960 get info. */ |
| /* |
| * Mon960 will set doorbell0 bit when it has completed the command. |
| */ |
| if (rkt_readl(dev, OutboundDoorbellReg) & OUTBOUNDDOORBELL_0) { |
| /* |
| * Clear the doorbell. |
| */ |
| rkt_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0); |
| ok = 1; |
| break; |
| } |
| /* |
| * Yield the processor in case we are slow |
| */ |
| set_current_state(TASK_UNINTERRUPTIBLE); |
| schedule_timeout(1); |
| } |
| if (ok != 1) { |
| /* |
| * Restore interrupt mask even though we timed out |
| */ |
| if (dev->new_comm_interface) |
| rkt_writeb(dev, MUnit.OIMR, dev->OIMR = 0xf7); |
| else |
| rkt_writeb(dev, MUnit.OIMR, dev->OIMR = 0xfb); |
| return -ETIMEDOUT; |
| } |
| /* |
| * Pull the synch status from Mailbox 0. |
| */ |
| if (status) |
| *status = rkt_readl(dev, IndexRegs.Mailbox[0]); |
| if (r1) |
| *r1 = rkt_readl(dev, IndexRegs.Mailbox[1]); |
| if (r2) |
| *r2 = rkt_readl(dev, IndexRegs.Mailbox[2]); |
| if (r3) |
| *r3 = rkt_readl(dev, IndexRegs.Mailbox[3]); |
| if (r4) |
| *r4 = rkt_readl(dev, IndexRegs.Mailbox[4]); |
| /* |
| * Clear the synch command doorbell. |
| */ |
| rkt_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0); |
| /* |
| * Restore interrupt mask |
| */ |
| if (dev->new_comm_interface) |
| rkt_writeb(dev, MUnit.OIMR, dev->OIMR = 0xf7); |
| else |
| rkt_writeb(dev, MUnit.OIMR, dev->OIMR = 0xfb); |
| return 0; |
| |
| } |
| |
| /** |
| * aac_rkt_interrupt_adapter - interrupt adapter |
| * @dev: Adapter |
| * |
| * Send an interrupt to the i960 and breakpoint it. |
| */ |
| |
| static void aac_rkt_interrupt_adapter(struct aac_dev *dev) |
| { |
| rkt_sync_cmd(dev, BREAKPOINT_REQUEST, 0, 0, 0, 0, 0, 0, |
| NULL, NULL, NULL, NULL, NULL); |
| } |
| |
| /** |
| * aac_rkt_notify_adapter - send an event to the adapter |
| * @dev: Adapter |
| * @event: Event to send |
| * |
| * Notify the i960 that something it probably cares about has |
| * happened. |
| */ |
| |
| static void aac_rkt_notify_adapter(struct aac_dev *dev, u32 event) |
| { |
| switch (event) { |
| |
| case AdapNormCmdQue: |
| rkt_writel(dev, MUnit.IDR,INBOUNDDOORBELL_1); |
| break; |
| case HostNormRespNotFull: |
| rkt_writel(dev, MUnit.IDR,INBOUNDDOORBELL_4); |
| break; |
| case AdapNormRespQue: |
| rkt_writel(dev, MUnit.IDR,INBOUNDDOORBELL_2); |
| break; |
| case HostNormCmdNotFull: |
| rkt_writel(dev, MUnit.IDR,INBOUNDDOORBELL_3); |
| break; |
| case HostShutdown: |
| // rkt_sync_cmd(dev, HOST_CRASHING, 0, 0, 0, 0, 0, 0, |
| // NULL, NULL, NULL, NULL, NULL); |
| break; |
| case FastIo: |
| rkt_writel(dev, MUnit.IDR,INBOUNDDOORBELL_6); |
| break; |
| case AdapPrintfDone: |
| rkt_writel(dev, MUnit.IDR,INBOUNDDOORBELL_5); |
| break; |
| default: |
| BUG(); |
| break; |
| } |
| } |
| |
| /** |
| * aac_rkt_start_adapter - activate adapter |
| * @dev: Adapter |
| * |
| * Start up processing on an i960 based AAC adapter |
| */ |
| |
| static void aac_rkt_start_adapter(struct aac_dev *dev) |
| { |
| struct aac_init *init; |
| |
| init = dev->init; |
| init->HostElapsedSeconds = cpu_to_le32(get_seconds()); |
| // We can only use a 32 bit address here |
| rkt_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS, (u32)(ulong)dev->init_pa, |
| 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL); |
| } |
| |
| /** |
| * aac_rkt_check_health |
| * @dev: device to check if healthy |
| * |
| * Will attempt to determine if the specified adapter is alive and |
| * capable of handling requests, returning 0 if alive. |
| */ |
| static int aac_rkt_check_health(struct aac_dev *dev) |
| { |
| u32 status = rkt_readl(dev, MUnit.OMRx[0]); |
| |
| /* |
| * Check to see if the board failed any self tests. |
| */ |
| if (status & SELF_TEST_FAILED) |
| return -1; |
| /* |
| * Check to see if the board panic'd. |
| */ |
| if (status & KERNEL_PANIC) { |
| char * buffer; |
| struct POSTSTATUS { |
| __le32 Post_Command; |
| __le32 Post_Address; |
| } * post; |
| dma_addr_t paddr, baddr; |
| int ret; |
| |
| if ((status & 0xFF000000L) == 0xBC000000L) |
| return (status >> 16) & 0xFF; |
| buffer = pci_alloc_consistent(dev->pdev, 512, &baddr); |
| ret = -2; |
| if (buffer == NULL) |
| return ret; |
| post = pci_alloc_consistent(dev->pdev, |
| sizeof(struct POSTSTATUS), &paddr); |
| if (post == NULL) { |
| pci_free_consistent(dev->pdev, 512, buffer, baddr); |
| return ret; |
| } |
| memset(buffer, 0, 512); |
| post->Post_Command = cpu_to_le32(COMMAND_POST_RESULTS); |
| post->Post_Address = cpu_to_le32(baddr); |
| rkt_writel(dev, MUnit.IMRx[0], paddr); |
| rkt_sync_cmd(dev, COMMAND_POST_RESULTS, baddr, 0, 0, 0, 0, 0, |
| NULL, NULL, NULL, NULL, NULL); |
| pci_free_consistent(dev->pdev, sizeof(struct POSTSTATUS), |
| post, paddr); |
| if ((buffer[0] == '0') && (buffer[1] == 'x')) { |
| ret = (buffer[2] <= '9') ? (buffer[2] - '0') : (buffer[2] - 'A' + 10); |
| ret <<= 4; |
| ret += (buffer[3] <= '9') ? (buffer[3] - '0') : (buffer[3] - 'A' + 10); |
| } |
| pci_free_consistent(dev->pdev, 512, buffer, baddr); |
| return ret; |
| } |
| /* |
| * Wait for the adapter to be up and running. |
| */ |
| if (!(status & KERNEL_UP_AND_RUNNING)) |
| return -3; |
| /* |
| * Everything is OK |
| */ |
| return 0; |
| } |
| |
| /** |
| * aac_rkt_send |
| * @fib: fib to issue |
| * |
| * Will send a fib, returning 0 if successful. |
| */ |
| static int aac_rkt_send(struct fib * fib) |
| { |
| u64 addr = fib->hw_fib_pa; |
| struct aac_dev *dev = fib->dev; |
| volatile void __iomem *device = dev->regs.rkt; |
| u32 Index; |
| |
| dprintk((KERN_DEBUG "%p->aac_rkt_send(%p->%llx)\n", dev, fib, addr)); |
| Index = rkt_readl(dev, MUnit.InboundQueue); |
| if (Index == 0xFFFFFFFFL) |
| Index = rkt_readl(dev, MUnit.InboundQueue); |
| dprintk((KERN_DEBUG "Index = 0x%x\n", Index)); |
| if (Index == 0xFFFFFFFFL) |
| return Index; |
| device += Index; |
| dprintk((KERN_DEBUG "entry = %x %x %u\n", (u32)(addr & 0xffffffff), |
| (u32)(addr >> 32), (u32)le16_to_cpu(fib->hw_fib->header.Size))); |
| writel((u32)(addr & 0xffffffff), device); |
| device += sizeof(u32); |
| writel((u32)(addr >> 32), device); |
| device += sizeof(u32); |
| writel(le16_to_cpu(fib->hw_fib->header.Size), device); |
| rkt_writel(dev, MUnit.InboundQueue, Index); |
| dprintk((KERN_DEBUG "aac_rkt_send - return 0\n")); |
| return 0; |
| } |
| |
| /** |
| * aac_rkt_init - initialize an i960 based AAC card |
| * @dev: device to configure |
| * |
| * Allocate and set up resources for the i960 based AAC variants. The |
| * device_interface in the commregion will be allocated and linked |
| * to the comm region. |
| */ |
| |
| int aac_rkt_init(struct aac_dev *dev) |
| { |
| unsigned long start; |
| unsigned long status; |
| int instance; |
| const char * name; |
| |
| instance = dev->id; |
| name = dev->name; |
| |
| /* |
| * Check to see if the board panic'd while booting. |
| */ |
| /* |
| * Check to see if the board failed any self tests. |
| */ |
| if (rkt_readl(dev, MUnit.OMRx[0]) & SELF_TEST_FAILED) { |
| printk(KERN_ERR "%s%d: adapter self-test failed.\n", dev->name, instance); |
| goto error_iounmap; |
| } |
| /* |
| * Check to see if the monitor panic'd while booting. |
| */ |
| if (rkt_readl(dev, MUnit.OMRx[0]) & MONITOR_PANIC) { |
| printk(KERN_ERR "%s%d: adapter monitor panic.\n", dev->name, instance); |
| goto error_iounmap; |
| } |
| /* |
| * Check to see if the board panic'd while booting. |
| */ |
| if (rkt_readl(dev, MUnit.OMRx[0]) & KERNEL_PANIC) { |
| printk(KERN_ERR "%s%d: adapter kernel panic'd.\n", dev->name, instance); |
| goto error_iounmap; |
| } |
| start = jiffies; |
| /* |
| * Wait for the adapter to be up and running. Wait up to 3 minutes |
| */ |
| while (!(rkt_readl(dev, MUnit.OMRx[0]) & KERNEL_UP_AND_RUNNING)) |
| { |
| if(time_after(jiffies, start+180*HZ)) |
| { |
| status = rkt_readl(dev, MUnit.OMRx[0]); |
| printk(KERN_ERR "%s%d: adapter kernel failed to start, init status = %lx.\n", |
| dev->name, instance, status); |
| goto error_iounmap; |
| } |
| set_current_state(TASK_UNINTERRUPTIBLE); |
| schedule_timeout(1); |
| } |
| if (request_irq(dev->scsi_host_ptr->irq, aac_rkt_intr, SA_SHIRQ|SA_INTERRUPT, "aacraid", (void *)dev)<0) |
| { |
| printk(KERN_ERR "%s%d: Interrupt unavailable.\n", name, instance); |
| goto error_iounmap; |
| } |
| /* |
| * Fill in the function dispatch table. |
| */ |
| dev->a_ops.adapter_interrupt = aac_rkt_interrupt_adapter; |
| dev->a_ops.adapter_disable_int = aac_rkt_disable_interrupt; |
| dev->a_ops.adapter_notify = aac_rkt_notify_adapter; |
| dev->a_ops.adapter_sync_cmd = rkt_sync_cmd; |
| dev->a_ops.adapter_check_health = aac_rkt_check_health; |
| dev->a_ops.adapter_send = aac_rkt_send; |
| |
| /* |
| * First clear out all interrupts. Then enable the one's that we |
| * can handle. |
| */ |
| rkt_writeb(dev, MUnit.OIMR, 0xff); |
| rkt_writel(dev, MUnit.ODR, 0xffffffff); |
| rkt_writeb(dev, MUnit.OIMR, dev->OIMR = 0xfb); |
| |
| if (aac_init_adapter(dev) == NULL) |
| goto error_irq; |
| if (dev->new_comm_interface) { |
| /* |
| * FIB Setup has already been done, but we can minimize the |
| * damage by at least ensuring the OS never issues more |
| * commands than we can handle. The Rocket adapters currently |
| * can only handle 246 commands and 8 AIFs at the same time, |
| * and in fact do notify us accordingly if we negotiate the |
| * FIB size. The problem that causes us to add this check is |
| * to ensure that we do not overdo it with the adapter when a |
| * hard coded FIB override is being utilized. This special |
| * case warrants this half baked, but convenient, check here. |
| */ |
| if (dev->scsi_host_ptr->can_queue > (246 - AAC_NUM_MGT_FIB)) { |
| dev->init->MaxIoCommands = cpu_to_le32(246); |
| dev->scsi_host_ptr->can_queue = 246 - AAC_NUM_MGT_FIB; |
| } |
| rkt_writeb(dev, MUnit.OIMR, dev->OIMR = 0xf7); |
| } |
| /* |
| * Tell the adapter that all is configured, and it can start |
| * accepting requests |
| */ |
| aac_rkt_start_adapter(dev); |
| return 0; |
| |
| error_irq: |
| rkt_writeb(dev, MUnit.OIMR, dev->OIMR = 0xff); |
| free_irq(dev->scsi_host_ptr->irq, (void *)dev); |
| |
| error_iounmap: |
| |
| return -1; |
| } |